MD Settings: Use a browser proxy from the languages page. Re-enable test.

chrome/browser/resources/settings/languages_page/languages_page.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview 'settings-languages-page' is the settings page
  * for language and input method settings.
  */
 cr.exportPath('settings');
 
@@ skipping 63 matching lines @@
 // <if expr="chromeos">
         map.set(
             settings.Route.INPUT_METHODS.path,
             '#inputMethodsCollapse .subpage-arrow');
 // </if>
         return map;
       },
     },
   },
 
+  /** @private {?settings.LanguagesBrowserProxy} */
+  browserProxy_: null,
+
+  /** @override */
+  attached: function() {
+    this.browserProxy_ = settings.LanguagesBrowserProxyImpl.getInstance();
+  },
+
   /**
    * Stamps and opens the Add Languages dialog, registering a listener to
    * disable the dialog's dom-if again on close.
    * @param {!Event} e
    * @private
    */
   onAddLanguagesTap_: function(e) {
     e.preventDefault();
     this.showAddLanguagesDialog_ = true;
     this.async(function() {
@@ skipping 89 matching lines @@
   onInputMethodTap_: function(e) {
     // Taps on the paper-icon-button are handled in onInputMethodOptionsTap_.
     if (e.target.tagName == 'PAPER-ICON-BUTTON')
       return;
 
     // Ignore key presses other than <Enter>.
     if (e.type == 'keypress' && e.key != 'Enter')
       return;
 
     // Set the input method.
-    this.languageHelper.setCurrentInputMethod(e.model.item.id);
+    this.browserProxy_.getInputMethodPrivate().setCurrentInputMethod(
+        e.model.item.id);
   },
 
   /**
    * Opens the input method extension's options page in a new tab (or focuses
    * an existing instance of the IME's options).
    * @param {!{model: !{item: chrome.languageSettingsPrivate.InputMethod}}} e
    * @private
    */
   onInputMethodOptionsTap_: function(e) {
-    this.languageHelper.openInputMethodOptions(e.model.item.id);
+    this.browserProxy_.getInputMethodPrivate().openOptionsPage(
+        e.model.item.id);
   },
 // </if>
 
 // <if expr="chromeos or is_win">
   /**
    * @return {boolean} True for a secondary user in a multi-profile session.
    * @private
    */
   isSecondaryUser_: function() {
     return cr.isChromeOS && loadTimeData.getBoolean('isSecondaryUser');
@@ skipping 38 matching lines @@
 
   /**
    * Handler for changes to the UI language checkbox.
    * @param {!{target: !PaperCheckboxElement}} e
    * @private
    */
   onUILanguageChange_: function(e) {
     // We don't support unchecking this checkbox. TODO(michaelpg): Ask for a
     // simpler widget.
     assert(e.target.checked);
-    this.languageHelper.setProspectiveUILanguage(
+    this.browserProxy_.setProspectiveUILanguage(
         this.detailLanguage_.language.code);
 
     this.closeMenuSoon_();
   },
 // </if>
 
   /**
    * @param {!chrome.languageSettingsPrivate.Language} language
    * @param {string} targetLanguageCode The default translate target language.
    * @return {boolean} True if the translate checkbox should be disabled.
@@ skipping 286 matching lines @@
     if (e.target.tagName == expandButtonTag)
       return;
 
     /** @type {!CrExpandButtonElement} */
     var expandButton = e.currentTarget.querySelector(expandButtonTag);
     assert(expandButton);
     expandButton.expanded = !expandButton.expanded;
   },
 });
 })();